… | |
… | |
28 | */ |
28 | */ |
29 | |
29 | |
30 | #ifndef ECB_H |
30 | #ifndef ECB_H |
31 | #define ECB_H |
31 | #define ECB_H |
32 | |
32 | |
|
|
33 | /* 16 bits major, 16 bits minor */ |
|
|
34 | #define ECB_VERSION 0x00010001 |
|
|
35 | |
33 | #ifdef _WIN32 |
36 | #ifdef _WIN32 |
34 | typedef signed char int8_t; |
37 | typedef signed char int8_t; |
35 | typedef unsigned char uint8_t; |
38 | typedef unsigned char uint8_t; |
36 | typedef signed short int16_t; |
39 | typedef signed short int16_t; |
37 | typedef unsigned short uint16_t; |
40 | typedef unsigned short uint16_t; |
… | |
… | |
42 | typedef unsigned long long uint64_t; |
45 | typedef unsigned long long uint64_t; |
43 | #else /* _MSC_VER || __BORLANDC__ */ |
46 | #else /* _MSC_VER || __BORLANDC__ */ |
44 | typedef signed __int64 int64_t; |
47 | typedef signed __int64 int64_t; |
45 | typedef unsigned __int64 uint64_t; |
48 | typedef unsigned __int64 uint64_t; |
46 | #endif |
49 | #endif |
|
|
50 | #ifdef _WIN64 |
|
|
51 | #define ECB_PTRSIZE 8 |
|
|
52 | typedef uint64_t uintptr_t; |
|
|
53 | typedef int64_t intptr_t; |
|
|
54 | #else |
|
|
55 | #define ECB_PTRSIZE 4 |
|
|
56 | typedef uint32_t uintptr_t; |
|
|
57 | typedef int32_t intptr_t; |
|
|
58 | #endif |
47 | #else |
59 | #else |
48 | #include <inttypes.h> |
60 | #include <inttypes.h> |
|
|
61 | #if UINTMAX_MAX > 0xffffffffU |
|
|
62 | #define ECB_PTRSIZE 8 |
|
|
63 | #else |
|
|
64 | #define ECB_PTRSIZE 4 |
|
|
65 | #endif |
49 | #endif |
66 | #endif |
50 | |
67 | |
51 | /* many compilers define _GNUC_ to some versions but then only implement |
68 | /* many compilers define _GNUC_ to some versions but then only implement |
52 | * what their idiot authors think are the "more important" extensions, |
69 | * what their idiot authors think are the "more important" extensions, |
53 | * causing enormous grief in return for some better fake benchmark numbers. |
70 | * causing enormous grief in return for some better fake benchmark numbers. |
54 | * or so. |
71 | * or so. |
55 | * we try to detect these and simply assume they are not gcc - if they have |
72 | * we try to detect these and simply assume they are not gcc - if they have |
56 | * an issue with that they should have done it right in the first place. |
73 | * an issue with that they should have done it right in the first place. |
57 | */ |
74 | */ |
58 | #ifndef ECB_GCC_VERSION |
75 | #ifndef ECB_GCC_VERSION |
59 | #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) |
76 | #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ |
60 | #define ECB_GCC_VERSION(major,minor) 0 |
77 | #define ECB_GCC_VERSION(major,minor) 0 |
61 | #else |
78 | #else |
62 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
79 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
63 | #endif |
80 | #endif |
64 | #endif |
81 | #endif |
65 | |
82 | |
|
|
83 | #define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ |
|
|
84 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
|
|
85 | #define ECB_C11 (__STDC_VERSION__ >= 201112L) |
|
|
86 | #define ECB_CPP (__cplusplus+0) |
|
|
87 | #define ECB_CPP11 (__cplusplus >= 201103L) |
|
|
88 | |
|
|
89 | #if ECB_CPP |
|
|
90 | #define ECB_EXTERN_C extern "C" |
|
|
91 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
|
|
92 | #define ECB_EXTERN_C_END } |
|
|
93 | #else |
|
|
94 | #define ECB_EXTERN_C extern |
|
|
95 | #define ECB_EXTERN_C_BEG |
|
|
96 | #define ECB_EXTERN_C_END |
|
|
97 | #endif |
|
|
98 | |
66 | /*****************************************************************************/ |
99 | /*****************************************************************************/ |
67 | |
100 | |
68 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
101 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
69 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
102 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
70 | |
103 | |
71 | #if ECB_NO_THREADS |
104 | #if ECB_NO_THREADS |
72 | # define ECB_NO_SMP 1 |
105 | #define ECB_NO_SMP 1 |
73 | #endif |
106 | #endif |
74 | |
107 | |
75 | #if ECB_NO_THREADS || ECB_NO_SMP |
108 | #if ECB_NO_SMP |
76 | #define ECB_MEMORY_FENCE do { } while (0) |
109 | #define ECB_MEMORY_FENCE do { } while (0) |
77 | #endif |
110 | #endif |
78 | |
111 | |
79 | #ifndef ECB_MEMORY_FENCE |
112 | #ifndef ECB_MEMORY_FENCE |
80 | #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
113 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
81 | #if __i386 || __i386__ |
114 | #if __i386 || __i386__ |
82 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
115 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
83 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ |
116 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
84 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ |
117 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
85 | #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ |
118 | #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ |
86 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
119 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
87 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
120 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
88 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ |
121 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
89 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
122 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
90 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
123 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
91 | #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ |
124 | #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ |
92 | || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) |
125 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
93 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
126 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
94 | #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ |
127 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
95 | || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) |
128 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
96 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
129 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
97 | #elif __sparc || __sparc__ |
130 | #elif __sparc || __sparc__ |
98 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory") |
131 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
99 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
132 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
100 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
133 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
101 | #elif defined(__s390__) || defined(__s390x__) |
134 | #elif defined __s390__ || defined __s390x__ |
102 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
135 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
103 | #elif defined(__mips__) |
136 | #elif defined __mips__ |
104 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
137 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
|
|
138 | #elif defined __alpha__ |
|
|
139 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
|
|
140 | #elif defined __hppa__ |
|
|
141 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
|
|
142 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
|
|
143 | #elif defined __ia64__ |
|
|
144 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
105 | #endif |
145 | #endif |
106 | #endif |
146 | #endif |
107 | #endif |
147 | #endif |
108 | |
148 | |
109 | #ifndef ECB_MEMORY_FENCE |
149 | #ifndef ECB_MEMORY_FENCE |
|
|
150 | #if ECB_GCC_VERSION(4,7) |
|
|
151 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
|
|
152 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
|
|
153 | /*#elif defined __clang && __has_feature (cxx_atomic)*/ |
|
|
154 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
|
|
155 | /*#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)*/ |
110 | #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__) |
156 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
111 | #define ECB_MEMORY_FENCE __sync_synchronize () |
157 | #define ECB_MEMORY_FENCE __sync_synchronize () |
112 | /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ |
|
|
113 | /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ |
|
|
114 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
158 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
115 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
159 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
116 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
160 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
117 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
161 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
118 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
162 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
119 | #elif defined(_WIN32) |
163 | #elif defined _WIN32 |
120 | #include <WinNT.h> |
164 | #include <WinNT.h> |
121 | #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
165 | #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
122 | #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
166 | #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
123 | #include <mbarrier.h> |
167 | #include <mbarrier.h> |
124 | #define ECB_MEMORY_FENCE __machine_rw_barrier () |
168 | #define ECB_MEMORY_FENCE __machine_rw_barrier () |
125 | #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () |
169 | #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () |
126 | #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () |
170 | #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () |
127 | #elif __xlC__ |
171 | #elif __xlC__ |
128 | #define ECB_MEMORY_FENCE __sync () |
172 | #define ECB_MEMORY_FENCE __sync () |
|
|
173 | #endif |
|
|
174 | #endif |
|
|
175 | |
|
|
176 | #ifndef ECB_MEMORY_FENCE |
|
|
177 | #if ECB_C11 && !defined __STDC_NO_ATOMICS__ |
|
|
178 | /* we assume that these memory fences work on all variables/all memory accesses, */ |
|
|
179 | /* not just C11 atomics and atomic accesses */ |
|
|
180 | #include <stdatomic.h> |
|
|
181 | /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */ |
|
|
182 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
|
|
183 | /* Why that is, we don't know - either the C11 memory model is quite useless */ |
|
|
184 | /* for most usages, or gcc and clang have a bug */ |
|
|
185 | /* I *currently* lean towards the latter, and inefficiently implement */ |
|
|
186 | /* all three of ecb's fences as a seq_cst fence */ |
|
|
187 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
129 | #endif |
188 | #endif |
130 | #endif |
189 | #endif |
131 | |
190 | |
132 | #ifndef ECB_MEMORY_FENCE |
191 | #ifndef ECB_MEMORY_FENCE |
133 | #if !ECB_AVOID_PTHREADS |
192 | #if !ECB_AVOID_PTHREADS |
… | |
… | |
145 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
204 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
146 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
205 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
147 | #endif |
206 | #endif |
148 | #endif |
207 | #endif |
149 | |
208 | |
150 | #if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE) |
209 | #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE |
151 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
210 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
152 | #endif |
211 | #endif |
153 | |
212 | |
154 | #if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE) |
213 | #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE |
155 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
214 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
156 | #endif |
215 | #endif |
157 | |
216 | |
158 | /*****************************************************************************/ |
217 | /*****************************************************************************/ |
159 | |
|
|
160 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
|
|
161 | |
218 | |
162 | #if __cplusplus |
219 | #if __cplusplus |
163 | #define ecb_inline static inline |
220 | #define ecb_inline static inline |
164 | #elif ECB_GCC_VERSION(2,5) |
221 | #elif ECB_GCC_VERSION(2,5) |
165 | #define ecb_inline static __inline__ |
222 | #define ecb_inline static __inline__ |
… | |
… | |
204 | #elif ECB_GCC_VERSION(3,0) |
261 | #elif ECB_GCC_VERSION(3,0) |
205 | #define ecb_decltype(x) __typeof(x) |
262 | #define ecb_decltype(x) __typeof(x) |
206 | #endif |
263 | #endif |
207 | |
264 | |
208 | #define ecb_noinline ecb_attribute ((__noinline__)) |
265 | #define ecb_noinline ecb_attribute ((__noinline__)) |
209 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
|
|
210 | #define ecb_unused ecb_attribute ((__unused__)) |
266 | #define ecb_unused ecb_attribute ((__unused__)) |
211 | #define ecb_const ecb_attribute ((__const__)) |
267 | #define ecb_const ecb_attribute ((__const__)) |
212 | #define ecb_pure ecb_attribute ((__pure__)) |
268 | #define ecb_pure ecb_attribute ((__pure__)) |
|
|
269 | |
|
|
270 | #if ECB_C11 |
|
|
271 | #define ecb_noreturn _Noreturn |
|
|
272 | #else |
|
|
273 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
|
|
274 | #endif |
213 | |
275 | |
214 | #if ECB_GCC_VERSION(4,3) |
276 | #if ECB_GCC_VERSION(4,3) |
215 | #define ecb_artificial ecb_attribute ((__artificial__)) |
277 | #define ecb_artificial ecb_attribute ((__artificial__)) |
216 | #define ecb_hot ecb_attribute ((__hot__)) |
278 | #define ecb_hot ecb_attribute ((__hot__)) |
217 | #define ecb_cold ecb_attribute ((__cold__)) |
279 | #define ecb_cold ecb_attribute ((__cold__)) |
… | |
… | |
308 | |
370 | |
309 | return r + ecb_ld32 (x); |
371 | return r + ecb_ld32 (x); |
310 | } |
372 | } |
311 | #endif |
373 | #endif |
312 | |
374 | |
|
|
375 | ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; |
|
|
376 | ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
|
|
377 | ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; |
|
|
378 | ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
|
|
379 | |
313 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; |
380 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; |
314 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) |
381 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) |
315 | { |
382 | { |
316 | return ( (x * 0x0802U & 0x22110U) |
383 | return ( (x * 0x0802U & 0x22110U) |
317 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
384 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
… | |
… | |
401 | ecb_inline void ecb_unreachable (void) ecb_noreturn; |
468 | ecb_inline void ecb_unreachable (void) ecb_noreturn; |
402 | ecb_inline void ecb_unreachable (void) { } |
469 | ecb_inline void ecb_unreachable (void) { } |
403 | #endif |
470 | #endif |
404 | |
471 | |
405 | /* try to tell the compiler that some condition is definitely true */ |
472 | /* try to tell the compiler that some condition is definitely true */ |
406 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
473 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
407 | |
474 | |
408 | ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; |
475 | ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; |
409 | ecb_inline unsigned char |
476 | ecb_inline unsigned char |
410 | ecb_byteorder_helper (void) |
477 | ecb_byteorder_helper (void) |
411 | { |
478 | { |
412 | const uint32_t u = 0x11223344; |
479 | /* the union code still generates code under pressure in gcc, */ |
413 | return *(unsigned char *)&u; |
480 | /* but less than using pointers, and always seem to */ |
|
|
481 | /* successfully return a constant. */ |
|
|
482 | /* the reason why we have this horrible preprocessor mess */ |
|
|
483 | /* is to avoid it in all cases, at least on common architectures */ |
|
|
484 | /* and yes, gcc defines __BYTE_ORDER__, g++ does not */ |
|
|
485 | #if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 |
|
|
486 | return 0x44; |
|
|
487 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
|
|
488 | return 0x44; |
|
|
489 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
|
|
490 | retrurn 0x11; |
|
|
491 | #else |
|
|
492 | union |
|
|
493 | { |
|
|
494 | uint32_t i; |
|
|
495 | uint8_t c; |
|
|
496 | } u = { 0x11223344 }; |
|
|
497 | return u.c; |
|
|
498 | #endif |
414 | } |
499 | } |
415 | |
500 | |
416 | ecb_inline ecb_bool ecb_big_endian (void) ecb_const; |
501 | ecb_inline ecb_bool ecb_big_endian (void) ecb_const; |
417 | ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
502 | ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
418 | ecb_inline ecb_bool ecb_little_endian (void) ecb_const; |
503 | ecb_inline ecb_bool ecb_little_endian (void) ecb_const; |
… | |
… | |
449 | } |
534 | } |
450 | #else |
535 | #else |
451 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
536 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
452 | #endif |
537 | #endif |
453 | |
538 | |
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539 | #if __STDC_IEC_559__ |
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540 | // we assume this is defined for most C and many C++ compilers |
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541 | ecb_inline ecb_bool ecb_float_ieee (void) ecb_const; |
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542 | ecb_inline ecb_bool ecb_float_ieee (void) { return 1; } |
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543 | ecb_inline ecb_bool ecb_double_ieee (void) ecb_const; |
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544 | ecb_inline ecb_bool ecb_double_ieee (void) { return 1; } |
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545 | #elif ECB_CPP |
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546 | #include <limits> |
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547 | ecb_inline ecb_bool ecb_float_ieee (void) ecb_const; |
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548 | ecb_inline ecb_bool ecb_float_ieee (void) { return std::numeric_limits<float >::is_iec559; } |
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549 | ecb_inline ecb_bool ecb_double_ieee (void) ecb_const; |
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550 | ecb_inline ecb_bool ecb_double_ieee (void) { return std::numeric_limits<double>::is_iec559; } |
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551 | #else |
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552 | ecb_inline ecb_bool ecb_float_ieee (void) ecb_const; |
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553 | ecb_inline ecb_bool ecb_float_ieee (void) { return 0; } |
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554 | ecb_inline ecb_bool ecb_double_ieee (void) ecb_const; |
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555 | ecb_inline ecb_bool ecb_double_ieee (void) { return 0; } |
454 | #endif |
556 | #endif |
455 | |
557 | |
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558 | // convert a float to ieee single/binary32 |
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559 | ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; |
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560 | ecb_function_ uint32_t |
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561 | ecb_float_to_binary32 (float x) |
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562 | { |
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563 | /* slow emulation, works for anything but nan's and -0 */ |
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564 | ECB_EXTERN_C float frexpf (float v, int *e); |
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565 | uint32_t r, m; |
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566 | int e; |
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567 | |
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568 | if (x == 0e0f ) return 0; |
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569 | if (x > +3.40282346638528860e+38f) return 0x7f800000U; |
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570 | if (x < -3.40282346638528860e+38f) return 0xff800000U; |
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571 | |
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572 | m = frexpf (x, &e) * 0x1000000U; |
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573 | |
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574 | r = m & 0x80000000U; |
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575 | |
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576 | if (r) |
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577 | m = -m; |
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578 | |
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579 | if (e < -125) |
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580 | { |
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581 | m &= 0xffffffU; |
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582 | m >>= (-125 - e); |
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583 | e = -126; |
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584 | } |
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585 | |
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586 | r |= (e + 126) << 23; |
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587 | r |= m & 0x7fffffU; |
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588 | |
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589 | return r; |
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590 | } |
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591 | |
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592 | // converts a ieee single/binary32 to a float |
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593 | ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; |
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594 | ecb_function_ float |
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595 | ecb_binary32_to_float (uint32_t x) |
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|
596 | { |
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|
597 | /* emulation, only works for normals and subnormals and +0 */ |
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598 | ECB_EXTERN_C float ldexpf (float x, int e); |
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599 | |
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|
600 | int neg = x >> 31; |
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601 | int e = (x >> 23) & 0xffU; |
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|
602 | float r; |
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603 | |
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604 | x &= 0x7fffffU; |
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605 | |
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606 | if (e) |
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607 | x |= 0x800000U; |
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608 | |
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609 | /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ |
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610 | r = ldexpf (x * (1.f / 0x1000000U), e - 126); |
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611 | |
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612 | return neg ? -r : r; |
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613 | } |
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614 | |
|
|
615 | ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; |
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616 | ecb_function_ uint64_t |
|
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617 | ecb_double_to_binary64 (double x) |
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618 | { |
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619 | } |
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620 | |
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|
621 | #endif |
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622 | |